Potential conflict in foreign airspace.

Attributes
ACN	271596
Time
Date	199405
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : xac
State Reference	FO
Altitude	msl bound lower : 31000 msl bound upper : 32500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B747-100
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	descent other
Route In Use	enroute airway : g597
Flight Plan	IFR
Aircraft 2
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	other : unknown
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 160 flight time total : 8785 flight time type : 3015
ASRS Report	271596
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 6000 flight time type : 3000
ASRS Report	271494
Events
Anomaly	conflict : airborne less severe non adherence : clearance non adherence : required legal separation other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 21000 vertical : 700
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Pilot Deviation
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

Our flight was given descent clearance from FL370 to FL310. TCASII alert came on at about FL317. Moments later we had a TCASII resolution command of 'climb crossing climb.' first officer started a climb and after hearing 'clear of conflict' leveled off at 32500 ft. We did not see the traffic until it passed off to the left at approximately FL310, tokyo center was notified of TCASII deviation. We then verified clearance for descent to FL310. Supplemental information from acn 271494: during descent from 370- 310 was advised by tokyo control to expedite descent 'traffic at FL330.' passing FL320 was alerted by TCASII climb' resolution. Was reluctant to climb due to previous TA. Air mass was clear and only target information on the TCASII scope was a 'plus' at 11 O'clock. Resolution display continued to move on left edge of TCASII scope showing only 'plus.' climb advisory continued. Display moves off left edge of display showing '00 plus.' I climbed immediately, target came into sight 10 O'clock, 3-4 mi. Climb peaked at 32500 ft. Supplemental information from acn 271499: aircraft went off left wing at about 5 mi same altitude. Tyo center would not admit to problem.

Original NASA ASRS Text

Title: POTENTIAL CONFLICT IN FOREIGN AIRSPACE.

Narrative: OUR FLT WAS GIVEN DSCNT CLRNC FROM FL370 TO FL310. TCASII ALERT CAME ON AT ABOUT FL317. MOMENTS LATER WE HAD A TCASII RESOLUTION COMMAND OF 'CLB XING CLB.' FO STARTED A CLB AND AFTER HEARING 'CLR OF CONFLICT' LEVELED OFF AT 32500 FT. WE DID NOT SEE THE TFC UNTIL IT PASSED OFF TO THE L AT APPROX FL310, TOKYO CTR WAS NOTIFIED OF TCASII DEV. WE THEN VERIFIED CLRNC FOR DSCNT TO FL310. SUPPLEMENTAL INFO FROM ACN 271494: DURING DSCNT FROM 370- 310 WAS ADVISED BY TOKYO CTL TO EXPEDITE DSCNT 'TFC AT FL330.' PASSING FL320 WAS ALERTED BY TCASII CLB' RESOLUTION. WAS RELUCTANT TO CLB DUE TO PREVIOUS TA. AIR MASS WAS CLR AND ONLY TARGET INFO ON THE TCASII SCOPE WAS A 'PLUS' AT 11 O'CLOCK. RESOLUTION DISPLAY CONTINUED TO MOVE ON L EDGE OF TCASII SCOPE SHOWING ONLY 'PLUS.' CLB ADVISORY CONTINUED. DISPLAY MOVES OFF L EDGE OF DISPLAY SHOWING '00 PLUS.' I CLBED IMMEDIATELY, TARGET CAME INTO SIGHT 10 O'CLOCK, 3-4 MI. CLB PEAKED AT 32500 FT. SUPPLEMENTAL INFO FROM ACN 271499: ACFT WENT OFF L WING AT ABOUT 5 MI SAME ALT. TYO CTR WOULD NOT ADMIT TO PROB.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.